Trường hợp đầu $U_{1}=U_{0}.sin\varphi_{1}$Trường hợp sau $U_{2}=U_{0}.sin\varphi_{2}$Ta có $\varphi_{1}+\varphi_{2}=\pi/2$$\frac{U_{1}}{U_{2}}=tan\varphi_{1}$$\frac{P_{2}}{P_{1}}=\frac{I_{2}^{2}}{I^{2}_{1}}=\frac{cos^{2}\varphi_{2}}{cos^{2}\varphi_{1}}=tan^{2}\varphi_{1}=\frac{U^{2}_{1}}{U^{2}_{2}}=4$
Trường hợp đầu $U_{1}=U_{0}.sin\varphi_{1}$Trường hợp sau $U_{2}=U_{0}.sin\varphi_{2}$Ta có $\varphi_{1}+\varphi_{2}=\pi/2$$\frac{U_{1}}{U_{2}}=tan\varphi_{1}$$\frac{P_{2}}{P_{1}}=\frac{I_{2}^{2}}{I^{2}_{1}}=\frac{cos^{2}\varphi_{2}}{cos^{2}\varphi_{1}}=tan^{2}\varphi_{1}=\frac{U^{2}_{1}}{U^{2}_{2}}$
Trường hợp đầu $U_{1}=U_{0}.sin\varphi_{1}$Trường hợp sau $U_{2}=U_{0}.sin\varphi_{2}$Ta có $\varphi_{1}+\varphi_{2}=\pi/2$$\frac{U_{1}}{U_{2}}=tan\varphi_{1}$$\frac{P_{2}}{P_{1}}=\frac{I_{2}^{2}}{I^{2}_{1}}=\frac{cos^{2}\varphi_{2}}{cos^{2}\varphi_{1}}=tan^{2}\varphi_{1}=\frac{U^{2}_{1}}{U^{2}_{2}}
=4$